Quantitative equilibrium calculations

Fundamentals
Problems
      Fraction of atrazine
           Help
           Answer
     Retardation factor
           Answer
     Raining out
           Answer
     Carpet
           Help
           Answer
     Sorption kinetics
           Help
           Answer
     Organic pollutants in water
           Answer
     Fish toxicity test
           Answer
     Ethylacetate
           Answer
     Tetrachlorobenzene
           Answer
     Hexachlorobenzene
           Answer
     Chlorobenzene
           Answer
     Toxicity test
           Answer
     Toxicity test - improving...
     3 phases problem
           Answer
     Sorption experiment
           Answer
     HCH
Excercises for an improved intuitive understanding
Questions for recapitulation
Good to know
Minesweeper-problems

Chlorobenzene

a) A small amount of sorbent (volume 0.66 µL) is equilibrated with a water sample of 5 ml. In the subsequent analysis one 0.2 µg monochlorobenzene in the sorbent. The partition constant at room temperature is: log K = 2.89 (with K = Cchlorobenzene in sorbent (g/m3) / Cchlorobenzene in water (g/m3)). What has been the concentration monochlorobenzene in the original water sample? How much (in %) of the total amount of monochlorobenzene was eventually sorbed in the sorbent?

b) With the same water sample and the same sorbent as in a): What would have been the influence if there had been an air phase of 7 ml present during the equilibration of sorbent with the water. Which amount of monochlorobenzene would you expect to find in the sorbent in this case? The air-water partition constant is: KH = 0.15 (with K = Cchlorobenzene in air (g/m3) / Cchlorobenzene in water (g/m3) at room temperature.